Hair clipping machine



Aug.` 2, 1938. l w. RABALD 2,125,748

HAIR GLIPPINCT MACXIINE I Filed May 1e, 193e c I O 13501 Jyg Pig. 7 shows in top Patented Aug. 2, 1938 ,PATizVr oFFicii HAIR CLIPPING MACHINE Willy Rabald, Leipzig, Germany Application l 5 Claims.

This invention relates toa hair clipping machine equally suitable for dry shaving.- that is shaving without employing soap and water and for beard and hair cutting. 'I'he invention relates to a special construction of the clipper head, the design and operation of which are based on entirely diierent princilples to those of the known hair clipping apparatus and which is driven by a spring motor of special construction accommodated in a ilat han- 'dle casing tapering to the clipper head and of convenient oval cross-sectional shape.

According to the invention the clipper head is of arc-shaped cross-section with cutting edges ton both sides, and in which the upper clipper blade, movable in longitudinal direction towards the two sides, has on its longitudinal edges teeth, the 'gap between the teeth and the depth of the teeth being approximately equal to the thickness of a hair, that is about 0.2 to 0.3 millimetre, and is ground to knife-edge sharpness in a shape corresponding to that of the lower stati'onary `curved-guard, the` flexible shearing blade being held and-guided on each narrow sidevby a blade spring or a lever.

An embodiment of the invention isillustrated by way oi' example in one and a half natural size on the accompanying drawing in which: ti Fig. 1 shows the machine in longitudinal sec- Fig. 2 isa front elevation with the front ywall of the housing removed.

Fig. 3 shows the clipper blade in plan view. Fig. 4 is a side elevation of Fig. 3. v Fig. 5 shows the guard plate in top plan view. Fig. 6 is a side elevation of Fig. 5. f plan view on a scale about 20 times enlarged a portion of the guard with -clipper blade resting thereon.

The clipper head comprises a guard 2 of arcuate cross-section serving for supporting the clipper blade I.

v, The spring motor provided for shifting the clipper blade I is accommodated in a housing 6 4comprising two halves 3 .and I, and from the upper end of which' the clipper head projects so that it is completely exposed. 'Ihe clipper blade conforming with th'e curved shape of the guard 2 is sharpened and ground along its longitudinal sides to form teeth having a gap and a depth 'both equal to the thickness of a hair, that is about 0.2 to 0.3millimetre (Fig. 7). The reciprocating movement of the clipper blade I of the hair clipping machine is eilected by an arm I of a two-armed lever l oscillated by the spring May 1s, 193s, serial No. 80,151 Germany May 17, 1935 motor. The housing 6 (3 and 4) accommodates the motor spring 8 connected at its outer end to the inner side of the housing wall at 9, Whereas its inner end is mounted on a winding pin Illat II. The spring 8 is wound by means of a key inserted into a square hole the winding pin I0. A toothed Wheel I3 is keyed on the pin I0 and meshes with a toothed wheel I1 slipped on the hub I4 of a toothed Wheel I 6 rotatable on a pin I5 projecting from the spring barrel. A pawl I8 arranged on the side of the toothed wheel I6 adjacent the toothed wheel I'I, which is recessed to partly accommodate the wheel I6` and save space, allows the winding of the spring 8 without influencing the toothed wheel I6, whereasjwhen the spring 8 exerts a pulling action, the toothed wheel i6 is coupled with the toothed wheel I1, causing this wheel to rotate and this rotary movement is transmitted to a pinion I Sslipped loosely on to an arbor 20 projecting from the inner side of the casing half 3. 'I'he hub 22 of the governor disc 2l iits on the pinion I9, so that the generator disc 2l and consequently the Agovernor participates in the rotation of the pinion I8.

In order to convert the rotary movement into an oscillating movement, such as is necessary for the clipper blade I, a triangular cam 23 with convex sides is mounted on the hub 22 of the regulator disc 2l. This cam is engaged by the bifurcated en d of an arm 24 forming with the above mentioned arm 5 the two-armed lever 1 oscillatable about a pivot pin 25. The end of the arm 5 vprojects into an aperture 26 in clipper blade I in such a manner that, when being oscillated alternately to one side and the other by the rapidly rotating triangular cam 23, it eiiectsv the longitudinal movement of the vclipper blade I.

In order vto prevent the movements of the arm 2t being checked by neighbouring parts and in order to save space, this arm is ogival and adjustably connected by screws 21 to the upwardly extending arm 5' engaging the clipper blade I.- This adjustability is attained by the fact that one of the screws 21, besides serving as iixing means, is also a pivot, whereas the other screw I2 or a' slotin has clearance at the point where it passes through y 'the arm 2li, and this clearance allows an adjustment. 'I'he pivot pin 25 for the two-armed lever I is mounted in a strap 28 provided in the spring barrel and secured .both in the wall of the spring drum and also in the side walls of the housing part 3. The strap 28, in the example illustrated. is at the same time a support for stays 29 for iixing the guard 2.

To enable the bifurcated end of the arm 24 to freely engage the triangular ycam 23, two plate-shaped abutments 30 are iittedone on each of the two prongs. To enable the motor to be stopped at any time when the machine is not required for use, a stop 3| is provided which, when shifted in the direction of the arrow (Fig. 2) by exerting pressure on the knob 32 accessible from the outer side of the housing, arrests the movement of the arm 24.

So as to still further reduce space in vertical direction and to ensure smooth running, the weights distributed uniformly around the periphery of the governor disc 2I are each held by two blade springs 36, 31 arranged at an angle to one another. As the triangular cam 23 and governor disc 2| are rigidly connected, separate transmission elements are unnecessary.

The clipper blade I is held by blade springs 38 and the toothed cutting edges of the blade I are resiliently pressed against the curved guard surface by blade springs 38 which snap into recesses II in the small sides of the blade I. These springs allow the movement and guiding of the blade, and if moved apart, allow the blade to be liitedoff the guard.

An aperture 40 is provided in the guard 2 corresponding with the aperture 26 in the blade I and of such size that it allows the arm 5 to oscillate without hindrance. Apertures 42 are provided in the narrow sides of the guard 2 to enable the blade springs 38 to move without hindrance.

1. A hair clipping machine, comprising in combination a clipper head composed of a guard and a clipper blade both of curved cross-section of approximately the same radius, the edges of the blade resiliently bearing against the guard and being provided with teeth of a depth of about 0.2 millimetre hollowed out to knife edge sharpness on the side of the blade adjacent the guard, means for holding and vguiding said blade on said guard, a housing carrying said clipper head, a. spring motor accommodated in said housing, and means for transmitting rotary motion of said motor to reciprocate said blade.

2. A hair clipping machine, comprising in` combination a clipper head composed of a guard and a clipper blade both of curvedl cross-section of approximately the same radius, the edges of the blade resiliently bearing against the guard and being provided with teeth of a depth of about 0.2 millimetre hollowed out to knife edge sharpness on the side of the blade adjacent the guard, blade springs on said guard holding and guiding said blade on said guard, a housing carrying said clipper head, a spring motor accommodated in said housing, and means for transmitting rotary motion of said motor to reciprocate said blade.

3. Ahair clipping machine, comprising in combination a clipper head composed of a guard and a clipper blade both of curved cross-section of approximately the same radius, the edges of the blade resiliently bearing against the guard and being provided with teeth of a depth or about 0.2 millimetre hollowed out to knife edge sharpness on the side of the blade adjacent the guard, levers on said guard holding and guiding said blade on said guard, a housing carrying said clipper head, a spring motor accommodated in said housing, and means for transmitting rotary motion of said motor to reciprocate said blade.

4. In a machine as specied in claim 1 the transmitting means, comprising a pivot pin in said housing, a two-armed lever oscillatably mounted on said pin, said blade having anaperture and one arm of said lever projecting through said aperture, a triangular cam driven by the spring motor cooperating with the other arm of said lever to oscillate said lever and impart a reciprocating movement to said blade, and a governor disc connected with said cam to maintain the rotation of said cam constant.

5. In a machine as specied in claim 1 the transmitting means, comprising a pivot pin in said housing, a two-armed lever.` oscillatably mounted on said pin, said blade \having an aperture and one arm of said lever projecting through said aperture, a triangular cam driven by the spring motor cooperating with the other arm of said'lever to oscillate said lever and impart a reciprocating movement to said blade, a governor disc connected with said cam to maintain the rotation of said cam constant, weights on said governor discs,- and two blade springs carrying each of said weights and enclosing an 'angle of 90.

WILLY RABALD. 

